Blacksmith s twyee by which the blast is heated and the top of the



sTATus PATENT orrion.

ELIAS KAIGHN, OF CAMDEN, NE\V JERSEY.

BLACKSMITHS TWYER BY WHICH THE BLAST IS HEATED AND THE TOP OF THE TVVYERMADE TO SERVE AS A HEARTH FOB, THE FORGE.

Specification of Letters Patent No. 2,030, dated April 2, 1841.

To all whom t may concern Be it known that I, ELIAS KAIGHN, of Camden,Gloucester' county, State of New Jersey, have invented a new and usefulImprovement in Twyers, and that the following is an exact description ofthe same, reference being had to the drawings, making a part of thesame. l

Figure l represents a perspective view, Fig. Q. horizontal sectionthrough the middle of the side.

Similar letters in the drawing refer to similar letters in thespecification.

The nature of my improvement is to enable a clear and unobstructeddraftl from the bellows to reach the coals of the furnace-and theoutside of the twyer being exposed to the heat, heats the air within, asit is passing` through the flue, and thereby enables me to use it forhot blast furnaces also for melting iron &c.

The twyer is a box made of cast iron, or any other metal; may be roundas that in the drawing, square or oblo-ng, having a side or sides, a topand bottom leading off intoa circular shaped hollow nozzle or stem. Thepipe of a bellows is to be inserted in this stem.

The twyer may be from 2 to l inches in height and from l to 2 feet long,including the stem aforesaid. In the top and in the bottom piece aboutthe middle of them, they each have a circular opening of 6 diameterl orthereabouts, in which is inserted the circular ash box B which extendsfrom the top to a point 3 or 4 inches below the bottom plate of thetwyer. All the above is cast in one piece-all the space surrounding theash box aforesaid, and between the top and bottom plate and sides of thetwyer. I call the air flue C, which enters into the circular area of thesteam D. Various holes C C C C which may be square, rectangu` box, B,and can be removed at pleasure. rIhe lower end of the ash box aforesaidis closed by a circular lid, which is passed from under the hearth, whenrequired by sliding the rod F outward. This rod is supported in thesides of the ash box above the lid, in circular openings-a small stripof iron or steel is passed from the bottom of the lid aforesaid to asuitable point on the rod F to make the lid fit tight to the mouth ofthe ash-box.

Instead of the ash box reaching below the bottom plate before mentionedof the twyer I make the bottom plate aforesaid, the bottom of the ashbox, and dispense with the circular opening in the said plate.

This twyer is intended to be used with or without the cover E. n

The twyer is placed in a suitable position horizontally. The nose of thebellows being inserted into the nozzle or stem of the said twyer, it isnow ready for operation, which is carried on by the air passing from thebellows around the flue C, into the hollow aperture of the ash box B, bymeansof small apertures therein, and so to the fire.

The top of this twyer may be used as a forge hearth, the coals beingplaced over it, and the cover aforesaid, and the ash box aforesaid maybe used as a furnace, the perforated cover being` removed, the air fromthe bellows in both cases entering the nozzle of the twyer and passingthrough the flue C, and then through the apertures in the ash box to thefire.

l/Vhat I claim as my improvement and wish to secure by Letters Patentis'- The construction of the twyer with a flue surrounding the ash box Bin combination with said ash box as set forthmalso in combination withthe foregoing, the arrangement of the upper surface of the twyer, as thehearth of the forge and the perforated cover E for admitting air to theflame &c all as setforth.

ELIAS KAIGHN.

Witnesses:

JOHN KAIGHN, ALLEN SAUNDRS.

